WALL TOLERANCES  ASTM A 120  ASTM A 53  ASTM A 106  API 5L
Same as ASTM A 106 Same as ASTM A 106 Minimum wall thickness at any point shall be not more than 12.5% under nominal wall specified SEAMLESS
Plus Minus
2-7/8” and smaller 20% 12-1/2%
3-1/2” 18% 12-1/2%
4” and larger 15% 12-1/2%
20% 12-1/2%
WELDED
Plus Minus
2-7/8” and smaller 20% 12-1/2%
3-1/2” 18% 12-1/2%
4” thru 18” 15% 12-1/2%
 20” and larger 17-1/2% 10%

 

CHEMISTRY

ASTM A 120 ASTM A 53 ASTM A 106 API 5 L
No specific chemical requirements listed except that for steel welded pipe shall be of soft weldable quality Carbon % Max. Mn. % Min. Mn. % Max. Phos. % Min. Phos. % Max. S % Max.
SEAMLESS
Carbon % Max. Mn. % Max Phos. % Max S % Max. Grade A 0.22 0.90 0.040 0.05
SEAMLESS (Type S) Open hearth, electric furnance, or basic oxygen Grade B 0.27 1.15 0.040 0.05
Grade A 0.25 0.95 0.05 0.06 Grade A Grade B Grade A25, Cl.1 0.21 0.30 0.60 0.045 0.06
Grade B 0.30 1.20 0.05 0.06 Carbon Max. 0.25% 0.30% Grade A25, Cl.11 0.21 0.30 0.60 0.045 0.080 0.06
ELECTRIC WELDED (Type E) Open hearth, electric furnance, or basic oxygen Manganese 0.27/0.93% .029/1.06% ELECTRIC WELDED
Grade A 0.25 0.95 0.05 0.06 Phosph., Max 0.048% 0.048% Grade A 0.21 0.90 0.040 0.05
Grade B 0.30 1.20 0.05 0.06 Sulphur, Max. 0.058% 0.058% Grade B 0.26 1.15 0.040 0.05
BUTT WELDED (Type F) Open hearth, electric furnance, or basic oxygen Silicon, Min 0.010% 0.10% Grade A25, Cl.1 0.21 0.30 0.60 0.045 0.06
0.08 0.06 Grade A25, Cl.11 0.21 0.30 0.60 0.045 0.080 0.06
BUTT WELDED
Grade A25, Cl.1 0.21 0.30 0.60 0.045 0.06
Grade A25, Cl.11 0.21 0.30 0.60 0.045 0.080 0.06
ASTM A 106 Grade A Grade B
Carbon, Max. 0.25% 0.30%
Managanese 0.27/0.93% .029/1.06%
Phosph., Max. 0.048% 0.048%
Sulphur, Max. 0.058% 0.058%
Silicon, Min. 0.010% 0.10%
API 5L
SEAMLESS
Carbon % Max. Mn. % Min. Mn. % Max. Phos. % Min. Phos. % Max. S % Max.
Grade A 0.22 0.90 0.040 0.05
Grade B 0.27 1.15 0.040 0.05
Grade A25, Cl.1 0.21 0.30 0.60 0.045 0.06
Grade A25, Cl.11 0.21 0.30 0.60 0.045 0.080 0.06
ELECTRIC WELDED
Grade A 0.21 0.90 0.040 0.05
Grade B 0.26 1.15 0.040 0.05
Grade A25, Cl.1 0.21 0.30 0.60 0.045 0.06
Grade A25, Cl.11 0.21 0.30 0.60 0.045 0.080 0.06
BUTT WELDED
Grade A25, Cl.1 0.21 0.30 0.60 0.045 0.06
Grade A25, Cl.11 0.21 0.30 0.60 0.045 0.080 0.06
PHYSICAL PROPERTIES
ASTM A 120 No physical properties specified
ASTM A 53
FURNACE WELDED (Butt Welded)
Open hearth Basic Oxygen or Electric Furance
Tensile Strength
   Min. psi 45,000
Yield Strength
   Min. psi 25,000
SEAMLESS or ELECTRIC WELDED
Grade A Grade B
Tensile Strength
   Min. psi 48,000 60,000
Yield Strength
   Min. psi 30,000 35,000